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What would you do differently to compute a 99% confidence interval instead of a 95% interval?
Your agricultural firm is considering the purchase of some farmland, and an indication of the quality of the land will be helpful.
For a cost savings project, you have captured data that show the following costs: delays between operations = $900.
When the owner of a small business reviews her list of contracts for 2011, she finds that 35% of the contracts were from clients she met at a large conference
What is the nominal rate of return associated with the two phases of Robert's life? Assume a monthly frequency.
Matt Demko is the loading dock supervisor for a dry cement packaging company. His work crew is composed of unskilled workers.
Summarize the variability in the cost of a traditional funeral service using the standard deviation, based on the data in Table below.
Consider the ages (in years) and maintenance costs (in thousands of dollars per year) for five similar printing presses.
Calculate the coefficient of variation of the maintenance costs of the presses. Calculate the standard deviation of the maintenance costs of the presses.
You are sales manager for a regional division of a beverage company. The sales goals for your representatives have an average of $768,000.
You have just learned that your suppliers are raising prices by 4% across the board. Now what are the average and standard deviation of your costs?
How would you go about creating a data collection plan as part of a program's needs assessment and planning?
After you went ahead with the product introduction you were considering, it turned out to have first-year sales of 38 (thousand).
How many corporations are within one standard deviation from the average? How does this compare to what you expect for a normal distribution?
Compare population variability of these two groups of cities. In particular, which group shows more variability in congestion from city to city?
Summarize the variability in admission prices for the theme parks shown in Table by reporting the standard deviation, the range, and the coefficient.
Find the standard deviation of these interest rates. What does this standard deviation tell you about banks in this area?
What does the standard deviation tell you about hotel prices in major cities in the United States?
Let us compare the distribution of the number of lifetime gifts of those who made a current donation to that of those who did not.
You have been trying to control the weight of a chocolate and peanut butter candy bar by intervening in the production process.
We have all been stopped by traffic at times and have had to sit there while freeway traffic has slowed to a crawl.
Interpret the standard deviation in a paragraph discussing the variation from one store to another.
Compute the standard deviation, viewing these airfares as a sample of fares that might be obtained under similar circumstances.
Suppose the firm actually produces 200,000 cartridges. How many standard deviations above or below the average is this figure?
Draw a histogram for this data set. Indicate the average and standard deviation on this graph.